CVE-2026-54999

Microsoft · Published July 14, 2026

8.8

CVSS v3.1

HIGH

Patch availableGet patch

Description

Windows TCP/IP Remote Code Execution Vulnerability. Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an unauthorized attacker to execute code over an adjacent network.

Affected Products

Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for x64-based Systems
Windows Server 2019
Windows Server 2019 (Server Core installation)

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C